| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
0.6%
|
|
| 1 | Not effective at all | 3 |
0.9%
|
| 2 | 1 |
0.3%
|
|
| 3 | 2 |
0.6%
|
|
| 4 | 11 |
3.3%
|
|
| 5 | 17 |
5.1%
|
|
| 6 | 27 |
8.1%
|
|
| 7 | 60 |
18%
|
|
| 8 | 66 |
19.8%
|
|
| 9 | 14 |
4.2%
|
|
| 10 | Very effective | 10 |
3%
|
| 11 | Don't know | 121 |
36.2%
|
| Sysmiss | 6 |